Material for covering heated surfaces



(No Model.)

, E. H. RUST. MATERIAL EOE COVERING HEATED SURFACES. No. 283,819.Patented Aug. 28,1883.

N. PETERS. Phnloiilhcgnphcr. Withingtbll. l!.c.

UNITED STATES.

PATENT OFFICE,

EPHRAIM HYDE RUST, or BOSTON, MASSACHUSETTS,

MATERIAL FOR COVERING HEATED SURFACES.

SPECIFICATION forming part of Letters Patent No. 283,819, dated August28, 1883; Application filed June 14 1883. (N model.)

Material for Covering Heated Surfaces, of

which the following description, in connection with the accompanyingdrawing, is a specification, like letters on the drawing representinglike parts.

This invention has for its object a novel compound or material forcovering heated surfaces to prevent loss of heat by radiation. My novelmaterial consists of infusorial earth, or, as it is called in Germany,where foundfliir fusorian erde,"and paper-pulpthat is to say, that kindof pulp used in making paper.

The invention is shown in the accompany ing sectional drawing as appliedto a bit of steam-pipe.

The infusorial earth is a most excellent nonconductor; but when mixedand made plastic and applied to a heated surface it apt to crack andscale off the said heated surface unless held together by some othersubstance.

As a binder for the infusorial earth I em- .ploy about twenty-five partsof pulp to sevensame with a liquid, preferably water, until plastic,and, if desired, I may addlime or other cementatious material.

The pulp used will preferably be made from bagging or manila rope; but,instead, I may use a wood pulp with a fiber as long as possible.

The proportions above stated may be varied. The paper pulp, besidesacting as a binding material, also acts to prevent radiation. As abinder its fibrous nature adds largely to the cohesiveness of thecovering, and being, when wet, very plastic, it admits of the coveringbeing applied very evenly and thoroughly on all shapes of surfaces.

I am not the first to employ infusorial earth-

